<template>
    <div class="detail">
        <Header/>
        <div class="main">
            <div class="course-info">
                <!--       视频播放的div         -->
                <div class="wrap-left">
                    <videoPlayer class="video-player vjs-custom-skin"
                                 ref="videoPlayer"
                                 :playsinline="true"
                                 :options="playerOptions"
                                 @play="onPlayerPlay($event)"
                                 @pause="onPlayerPause($event)">

                    </videoPlayer>
                </div>
                <div class="wrap-right">
                    <h3 class="course-name">{{course.name}}</h3>
                    <p class="data">{{course.students}}人在学&nbsp;&nbsp;&nbsp;&nbsp;课程总时长：{{course.lessons}}课时/{{course.lessons==course.pub_lessons?'更新完成':`已更新${course.pub_lessons}课时`}}&nbsp;&nbsp;&nbsp;&nbsp;难度：{{course.level_name}}</p>
                    <div class="sale-time">
                        <p class="sale-type">{{course.discount_name}}</p>
                        <p class="expire">距离结束：仅剩  {{parseInt(course.active_time/(24*3600))}}天 {{parseInt(course.active_time/3600%24)}}小时 {{parseInt(course.active_time/60%60)}}分 <span class="second">{{parseInt(course.active_time%60)}}</span> 秒</p>
                    </div>
                    <p class="course-price">
                        <span>活动价</span>
                        <span class="discount">¥{{course.real_price}}</span>
                        <span class="original">¥{{course.price}}</span>
                    </p>
                    <div class="buy">
                        <div class="buy-btn">
                            <button class="buy-now">立即购买</button>
                            <button class="free">免费试学</button>
                        </div>
                        <div class="add-cart" @click="add_cart"><img src="/static/image/cart-yellow.svg" alt="">加入购物车</div>
                    </div>
                </div>
            </div>
            <div class="course-tab">
                <ul class="tab-list">
                    <li :class="tabIndex==1?'active':''" @click="tabIndex=1">详情介绍</li>
                    <li :class="tabIndex==2?'active':''" @click="tabIndex=2">课程章节 <span :class="tabIndex!=2?'free':''">(试学)</span>
                    </li>
                    <li :class="tabIndex==3?'active':''" @click="tabIndex=3">用户评论 (42)</li>
                    <li :class="tabIndex==4?'active':''" @click="tabIndex=4">常见问题</li>
                </ul>
            </div>
            <div class="course-content">
                <div class="course-tab-list">
                    <div class="tab-item" v-if="tabIndex==1">
                        <p><img alt=""
                                src=""
                                width="840"></p>
                        <p><img alt=""
                                src=""
                                width="840"></p>
                        <p><img alt=""
                                src=""
                                width="840"></p>
                    </div>
                    <div class="tab-item" v-if="tabIndex==2">
                        <div class="tab-item-title">
                            <p class="chapter">课程章节</p>
                            <p class="chapter-length">共{{chapter_list.length}}章 {{course.lessons}}个课时</p>
                        </div>
                        <div class="chapter-item" v-for="chapter in chapter_list">
                            <p class="chapter-title">
                                <!--                                <img src="/static/image/1.svg" alt="">-->
                                <img src="../../../static/image/12.png" height="42" width="48"/>第{{chapter.chapter}}章·{{chapter.name}}</p>
                            <ul class="lesson-list">
                                <li class="lesson-item" v-for="(lesson,key) in chapter.coursesections">
                                    <p class="name"><span class="index">{{chapter.chapter}}--{{key+1}}</span> {{lesson.name}}
                                        <span class="free" v-if="lesson.free_trail">免费</span>
                                    </p>
                                    <p class="time">07:30 <img src="/static/image/chapter-player.svg"></p>
                                    <button class="try">立即试学</button>
                                </li>
<!--                                <li class="lesson-item">-->
<!--                                    <p class="name"><span class="index">1-2</span> Vue的双向绑定<span class="free">免费</span>-->
<!--                                    </p>-->
<!--                                    <p class="time">07:30 <img src="/static/image/chapter-player.svg"></p>-->
<!--                                    <button class="try">立即试学</button>-->
<!--                                </li>-->
                            </ul>
                        </div>
<!--                        <div class="chapter-item">-->
<!--                            <p class="chapter-title"><img src="/static/image/12.png" alt="">第2章·Vue发展过程</p>-->
<!--                            <ul class="lesson-list">-->
<!--                                <li class="lesson-item">-->
<!--                                    <p class="name"><span class="index">2-1</span> Vue脚手架</p>-->
<!--                                    <p class="time">07:30 <img src="/static/image/chapter-player.svg"></p>-->
<!--                                    <button class="try">立即购买</button>-->
<!--                                </li>-->
<!--                                <li class="lesson-item">-->
<!--                                    <p class="name"><span class="index">2-2</span> Vue的路由</p>-->
<!--                                    <p class="time">07:30 <img src="/static/image/chapter-player.svg"></p>-->
<!--                                    <button class="try">立即购买</button>-->
<!--                                </li>-->
<!--                            </ul>-->
<!--                        </div>-->
                    </div>
                    <div class="tab-item" v-if="tabIndex==3">
                        用户评论
                    </div>
                    <div class="tab-item" v-if="tabIndex==4">
                        常见问题
                    </div>
                </div>
                <div class="course-side">
                    <div class="teacher-info">
                        <h4 class="side-title"><span>授课老师</span></h4>
                        <div class="teacher-content">
                            <div class="cont1">
                                <!--                                <img src="/static/image/4.jpg">-->
                                <img src="../../../static/image/04.png"/>
                                <div class="name">
                                    <p class="teacher-name">{{course.teacher.name}}</p>
                                    <p class="teacher-title">{{course.teacher.title}}！</p>
                                </div>
                            </div>
                            <p class="narrative">{{course.teacher.signature}}</p>
                        </div>
                    </div>
                </div>
            </div>
        </div>
        <Footer/>
    </div>
</template>

<script>

    import Header from "../common/Header";
    import Footer from "../common/Footer";
    import {videoPlayer} from 'vue-video-player'

    export default {
        name: "CourseDetail",
        data() {
            return {
                course_id: 0,
                tabIndex: 2, // 当前选项卡显示的下标
                course:{
                    teacher:{}
                },
                chapter_list:[],
                playerOptions: {
                    playbackRates: [0.7, 1.0, 1.5, 2.0, 4.0, 12.0], // 播放速度
                    autoplay: false, //如果true,则自动播放
                    muted: false, // 默认情况下将会消除任何音频。
                    loop: false, // 循环播放
                    preload: 'auto',  // 建议浏览器在<video>加载元素后是否应该开始下载视频数据。auto浏览器选择最佳行为,立即开始加载视频（如果浏览器支持）
                    language: 'zh-CN',
                    aspectRatio: '16:9', // 将播放器置于流畅模式，并在计算播放器的动态大小时使用该值。值应该代表一个比例 - 用冒号分隔的两个数字（例如"16:9"或"4:3"）
                    fluid: true, // 当true时，Video.js player将拥有流体大小。换句话说，它将按比例缩放以适应其容器。
                    sources: [{ // 播放资源和资源格式
                        type: "video/mp4",
                        // type: "video/swf",
                        src: "http://img.ksbbs.com/asset/Mon_1703/05cacb4e02f9d9e.mp4" //你的视频地址（必填）  绑定自己的视频地址
                        // src: "http://www.pingguodj.com//player/player.swf" //你的视频地址（必填）  绑定自己的视频地址
                    }],
                    poster: "../static/image/course-cover.jpeg", //视频封面图
                    width: document.documentElement.clientWidth, // 默认视频全屏时的最大宽度
                    notSupportedMessage: '此视频暂无法播放，请稍后再试', //允许覆盖Video.js无法播放媒体源时显示的默认信息。
                }
            }
        },
        methods: {
            //检查用户是否登录的方法
            check_user_login(){
                let token=localStorage.user_token || sessionStorage.user_token;

                if(!token){
                    let self = this ;
                    this.$confirm("请先登录",{
                        callback(){
                            self.$router.push("/home/login");
                        }
                    });
                    return false
                }
                return token;
            },

            //添加商品到购物车
            add_cart(){
                //添加商品前用户已经登录才行,没有登录的话,跳转至登录页面
                let token= this.check_user_login();
                console.log(token);
                //添加商品发起请求
                this.$axios.post(`http://127.0.0.1:9000/cart/option/`,{
                    course_id:this.course_id,
                }, {
                        //提交token必须在请求头声明token
                    "Authorization": "jwt "+token,   //此处的jwt后面必须有个空格,这是格式要求,必须的
                }).then(res=>{
                    console.log("这是添加购物车成功的信息");
                    console.log(res.data);
                    this.$message.success(res.data.message);
                    //向状态机提交动作来修改商品的总数
                    this.$store.commit(`add_cart`,res.data.cart_length)
                }).catch(error=>{
                    console.log("这是购物车添加失败的错误信息");
                    console.log(error.response);
                })
            },

            //获取课程id
            get_course_id() {
                let course_id = this.$route.params.id;

                if (course_id > 0) {
                    // this.course = parseInt(course_id)
                    this.course_id = parseInt(course_id)
                } else {
                    let self = this;
                    this.alert("访问失败,页面不存在", "错误", {
                        callback() {
                            self.$route.go(-1)  //返回上一页即可
                        }
                    });
                    return false;
                }
                return course_id

            },
            // 获取当前课程的详细信息
            get_course_detail() {
                this.$axios({
                    // url: "http://127.0.0.1:9000/course/detail/" + this.course_id,
                    url: "http://127.0.0.1:9000/course/detail/" + this.course_id,

                    method: "get",
                }).then(res => {
                    console.log("获取的当前的课程的信息");
                    console.log(res.data);
                    this.course = res.data

                    //设置课程活动的倒计时
                    if (this.course.active_time > 0) {
                        let timer = setInterval(() => {
                            if (this.course.active_time > 1) {
                                this.course.active_time -= 1
                            } else {
                                clearInterval(timer)
                            }
                        }, 1000)
                    }
                }).catch(error => {
                    console.log(error);
                })
            },
            // get_course_detail(){
            get_course_chapter(){
                this.$axios.get(`http://127.0.0.1:9000/course/chapter/`,{
                    params:{
                        course:this.course_id
                    }
                }).then(res => {
                    console.log("章节对应的信息");
                    console.log(res.data);
                    // this.course = res.data
                    this.chapter_list= res.data
                }).catch(error => {
                    console.log(error);
                })
            },
            //获取章节以及对应的课时信息
            // get_course_chapter(){
            //     this.$axios({
            //         url:"http://127.0.0.1:9000/course/chapter/",
            //         method:"get",
            //         config:{
            //             params:{
            //                 course:this.course_id
            //             }
            //         }
            //     }).then(res=>{
            //         console.log("章节对应的信息");
            //         console.log(res.data);
            //         this.chapter_list=res.data
            //     }).catch(error=>{
            //         error.log
            //     })
            // },

            onPlayerPlay(event) {
            },
            onPlayerPause(event) {
            }
        },
        created() {
            this.get_course_id();
            this.get_course_detail();
            this.get_course_chapter()

        },
        components: {
            Header, Footer, videoPlayer
        }
    }
</script>


<style scoped>
    .main {
        background: #fff;
        padding-top: 30px;
    }

    .course-info {
        width: 1200px;
        margin: 0 auto;
        overflow: hidden;
    }

    .wrap-left {
        float: left;
        width: 690px;
        height: 388px;
        background-color: #000;
    }

    .wrap-right {
        float: left;
        position: relative;
        height: 388px;
    }

    .course-name {
        font-size: 20px;
        color: #333;
        padding: 10px 23px;
        letter-spacing: .45px;
    }

    .data {
        padding-left: 23px;
        padding-right: 23px;
        padding-bottom: 16px;
        font-size: 14px;
        color: #9b9b9b;
    }

    .sale-time {
        width: 464px;
        background: #84cc39;
        font-size: 14px;
        color: #4a4a4a;
        padding: 10px 23px;
        overflow: hidden;
    }

    .sale-type {
        font-size: 16px;
        color: #fff;
        letter-spacing: .36px;
        float: left;
    }

    .sale-time .expire {
        font-size: 14px;
        color: #fff;
        float: right;
    }

    .sale-time .expire .second {
        width: 24px;
        display: inline-block;
        background: #fafafa;
        color: #5e5e5e;
        padding: 6px 0;
        text-align: center;
    }

    .course-price {
        background: #fff;
        font-size: 14px;
        color: #4a4a4a;
        padding: 5px 23px;
    }

    .discount {
        font-size: 26px;
        color: #fa6240;
        margin-left: 10px;
        display: inline-block;
        margin-bottom: -5px;
    }

    .original {
        font-size: 14px;
        color: #9b9b9b;
        margin-left: 10px;
        text-decoration: line-through;
    }

    .buy {
        width: 464px;
        padding: 0px 23px;
        position: absolute;
        left: 0;
        bottom: 20px;
        overflow: hidden;
    }

    .buy .buy-btn {
        float: left;
    }

    .buy .buy-now {
        width: 125px;
        height: 40px;
        border: 0;
        background: #ffc210;
        border-radius: 4px;
        color: #fff;
        cursor: pointer;
        margin-right: 15px;
        outline: none;
    }

    .buy .free {
        width: 125px;
        height: 40px;
        border-radius: 4px;
        cursor: pointer;
        margin-right: 15px;
        background: #fff;
        color: #ffc210;
        border: 1px solid #ffc210;
    }

    .add-cart {
        float: right;
        font-size: 14px;
        color: #ffc210;
        text-align: center;
        cursor: pointer;
        margin-top: 10px;
    }

    .add-cart img {
        width: 20px;
        height: 18px;
        margin-right: 7px;
        vertical-align: middle;
    }

    .course-tab {
        width: 100%;
        background: #fff;
        margin-bottom: 30px;
        box-shadow: 0 2px 4px 0 #f0f0f0;

    }

    .course-tab .tab-list {
        width: 1200px;
        margin: auto;
        color: #4a4a4a;
        overflow: hidden;
    }

    .tab-list li {
        float: left;
        margin-right: 15px;
        padding: 26px 20px 16px;
        font-size: 17px;
        cursor: pointer;
    }

    .tab-list .active {
        color: #ffc210;
        border-bottom: 2px solid #ffc210;
    }

    .tab-list .free {
        color: #fb7c55;
    }

    .course-content {
        width: 1200px;
        margin: 0 auto;
        background: #FAFAFA;
        overflow: hidden;
        padding-bottom: 40px;
    }

    .course-tab-list {
        width: 880px;
        height: auto;
        padding: 20px;
        background: #fff;
        float: left;
        box-sizing: border-box;
        overflow: hidden;
        position: relative;
        box-shadow: 0 2px 4px 0 #f0f0f0;
    }

    .tab-item {
        width: 880px;
        background: #fff;
        padding-bottom: 20px;
        box-shadow: 0 2px 4px 0 #f0f0f0;
    }

    .tab-item-title {
        justify-content: space-between;
        padding: 25px 20px 11px;
        border-radius: 4px;
        margin-bottom: 20px;
        border-bottom: 1px solid #333;
        border-bottom-color: rgba(51, 51, 51, .05);
        overflow: hidden;
    }

    .chapter {
        font-size: 17px;
        color: #4a4a4a;
        float: left;
    }

    .chapter-length {
        float: right;
        font-size: 14px;
        color: #9b9b9b;
        letter-spacing: .19px;
    }

    .chapter-title {
        font-size: 16px;
        color: #4a4a4a;
        letter-spacing: .26px;
        padding: 12px;
        background: #eee;
        border-radius: 2px;
        display: -ms-flexbox;
        display: flex;
        -ms-flex-align: center;
        align-items: center;
    }

    .chapter-title img {
        width: 18px;
        height: 18px;
        margin-right: 7px;
        vertical-align: middle;
    }

    .lesson-list {
        padding: 0 20px;
    }

    .lesson-list .lesson-item {
        padding: 15px 20px 15px 36px;
        cursor: pointer;
        justify-content: space-between;
        position: relative;
        overflow: hidden;
    }

    .lesson-item .name {
        font-size: 14px;
        color: #666;
        float: left;
    }

    .lesson-item .index {
        margin-right: 5px;
    }

    .lesson-item .free {
        font-size: 12px;
        color: #fff;
        letter-spacing: .19px;
        background: #ffc210;
        border-radius: 100px;
        padding: 1px 9px;
        margin-left: 10px;
    }

    .lesson-item .time {
        font-size: 14px;
        color: #666;
        letter-spacing: .23px;
        opacity: 1;
        transition: all .15s ease-in-out;
        float: right;
    }

    .lesson-item .time img {
        width: 18px;
        height: 18px;
        margin-left: 15px;
        vertical-align: text-bottom;
    }

    .lesson-item .try {
        width: 86px;
        height: 28px;
        background: #ffc210;
        border-radius: 4px;
        font-size: 14px;
        color: #fff;
        position: absolute;
        right: 20px;
        top: 10px;
        opacity: 0;
        transition: all .2s ease-in-out;
        cursor: pointer;
        outline: none;
        border: none;
    }

    .lesson-item:hover {
        background: #fcf7ef;
        box-shadow: 0 0 0 0 #f3f3f3;
    }

    .lesson-item:hover .name {
        color: #333;
    }

    .lesson-item:hover .try {
        opacity: 1;
    }

    .course-side {
        width: 300px;
        height: auto;
        margin-left: 20px;
        float: right;
    }

    .teacher-info {
        background: #fff;
        margin-bottom: 20px;
        box-shadow: 0 2px 4px 0 #f0f0f0;
    }

    .side-title {
        font-weight: normal;
        font-size: 17px;
        color: #4a4a4a;
        padding: 18px 14px;
        border-bottom: 1px solid #333;
        border-bottom-color: rgba(51, 51, 51, .05);
    }

    .side-title span {
        display: inline-block;
        border-left: 2px solid #ffc210;
        padding-left: 12px;
    }

    .teacher-content {
        padding: 30px 20px;
        box-sizing: border-box;
    }

    .teacher-content .cont1 {
        margin-bottom: 12px;
        overflow: hidden;
    }

    .teacher-content .cont1 img {
        width: 54px;
        height: 54px;
        margin-right: 12px;
        float: left;
    }

    .teacher-content .cont1 .name {
        float: right;
    }

    .teacher-content .cont1 .teacher-name {
        width: 188px;
        font-size: 16px;
        color: #4a4a4a;
        padding-bottom: 4px;
    }

    .teacher-content .cont1 .teacher-title {
        width: 188px;
        font-size: 13px;
        color: #9b9b9b;
        white-space: nowrap;
    }

    .teacher-content .narrative {
        font-size: 14px;
        color: #666;
        line-height: 24px;
    }
</style>
